Learn More about Marble & Granite

MARBLE

Marble is a rock resulting from metamorphism of sedimentary carbonate rocks, (most commonly limestone or dolomite rock). Metamorphism causes variable recrystallization of the original carbonate mineral grains.

The resulting marble rock is typically composed of an interlocking mosaic of carbonate crystals. Primary sedimentary textures and structures of the original carbonate rock (protolith) have typically been modified or destroyed.

Pure white marble is the result of metamorphism of a very pure (silicate-poor) limestone or dolomite protolith. The characteristic swirls and veins of many colored marble varieties are usually due to various mineral impurities such as clay, silt, sand, iron oxides, or chert which were originally present as grains or layers in the limestone.

Green coloration is often due to serpentine resulting from originally high magnesium limestone or dolostone with silica impurities. These various impurities have been mobilized and recrystallized by the intense pressure and heat of the metamorphism.

The above is from Wikipedia. Please visit the article for a table of the various types of marble and from where each is sourced.

 

Granite

Polished granite is also a popular choice for kitchen countertops due to its high durability and aesthetic qualities. In building and for countertops, the term "granite" is often applied to all igneous rocks with large crystals, and not specifically to those with a granitic composition.

 

Granite is an igneous rock and is formed from magma. Granitic magma has many potential origins but it must intrude other rocks. Most granite intrusions are emplaced at depth within the crust, usually greater than 1.5 kilometers and up to 50 km depth within thick continental crust. The origin of granite is contentious and has led to varied schemes of classification. Classification schemes are regional and include French, British, and American systems.

Granites can be pink to gray in color, depending on their chemistry and mineralogy. By definition, granite has a color index (the percentage of the rock made up of dark minerals) of less than 25%.

Granite is nearly always massive (lacking internal structures), hard and tough, and therefore it has gained widespread use as a construction stone. The average density of granite is between 2.65 and 2.75 g/cm3, its compressive strength usually lies above 200 MPa, and its viscosity at standard temperature and pressure is 3-6 • 1019 Pa·s.

 

The above is from Wikipedia

Is Granite Safe?

The short answer is "yes."

In recent years, manufacturers of engineered stone have preyed on people's fear and ignorance to suggest that granite countertops are not safe to have in the home. Why? They want to sell more product.

Remember, granite has been used for thousands of years for floors, tiles, countertops, etc. It is a safe product. We work around it all day and have a disproportionate amount in our showroom/office. If it were unsafe, we a) would know about it and b) not be around it all day. We know it IS safe and want you to feel comfortable and confident about having granite in your space, too.

How did the rumors get started?

Granite is a natural source of radiation (Radon), like most natural stones. However, some granites have been reported to have higher radioactivity thereby raising some concerns about their safety.

A number of studies of the safety of granite have been done. Time after time, it has been shown that the levels of radon from granite countertops are not a health concern.

A thorough study of granite countertops was done (initiated and paid for by the Marble Institute of America) in November 2008 by National Health and Engineering Inc of USA, and found that all of the 39 full size granite slabs that were measured for the study showed radiation levels well below the European Union safety standards (section 4.1.1.1 of the National Health and Engineering study) and radon emission levels well below the average outdoor radon concentrations in the US.

 

For additional information, please email us for copies of several reports prepared on this subject. We are happy to answer any of your questions.

REMEMBER: We are around and working with these materials every single day. If there were safety concerns, we would want to be the first to know!

Learn More about the Quarries where we Source the Stone

We import the finest stone from around the world! Classically beautiful and exotic natural products from Europe, Asia, and South America are employed to enrich the splendor of your home and increase its value.

To help get some sense of what is involved, here is some information that can give you some insight into why marble and granite cost what they do, and what gives them the gorgeous appearance and durability that make them so desirable.

Want to learn more and see pictures of the quarries?

Please contact us today at 203.882.8221!

Visit Our Showroom

Come visit our ever-expanding showroom in Milford and see how natural stone will be hewn from large slabs by our craftsmen, fashioned into your custom design, and polished to perfection with edge detailing. Your home is sure to benefit from the luster of fine marble and granite. It has never been easier… Now is the time to accent your kitchen, baths, and the rest of your home with the pure essence of natural stone.

 

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Link to Picture Gallery

Eastern Marble and Granite - Marble Colors
Eastern Marble and Granite - Marble Colors
 
Eastern Marble & Granite - Granite Colors
Eastern Marble & Granite - Granite Colors
 

 

 

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